Transwestern Pipeline Company, LLC
Third Revised Volume No. 1
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Effective Date: 08/01/2007, Docket: RP06-614-003, Status: Effective
Second Revised Sheet No. 100 Second Revised Sheet No. 100 : Effective
Superseding: Original Sheet No. 100
GENERAL TERMS AND CONDITIONS
2.2 Transporter may not refuse to accept receipt of gas with a Hydrocarbon Dew point equal
to or less than 15 degrees Fahrenheit provided that such gas satisfies all other
applicable provisions of Transporter's FERC Gas Tariff. This standard shall be
referred to as Transporter's Hydrocarbon Dew Point Safe Harbor.
A. Transporter may, from time to time, as operationally necessary, establish and post
on its Internet Website a limit on Hydrocarbon Dew point for receipts on specified
segments or other specified locations on its system to prevent hydrocarbon liquid
fallout, or to ensure that gas will be accepted for delivery into interconnects with
interstate pipelines, intrastate pipelines, end-users or directly connected local
distribution companies; provided, however, Transporter may not make a posting that
sets a Hydrocarbon Dew point limitation of less than 15 degrees Fahrenheit.
B. When Transporter determines there is an operational necessity to post a Hydrocarbon
Dew point on a specific line segment or location, Transporter shall post on its
Internet Website each blended Hydrocarbon Dew point Transporter calculates for a
line segment or location within 24 hours of such calculation, and the method by
which the Hydrocarbon Dew point value was calculated. Transporter will include in
such posting the anticipated duration of the limitation as well as an explanation of
the basis for the Hydrocarbon Dew point limitation.
C. Transporter will provide as much prior notice as reasonably practicable and will
attempt to provide such notice at least two (2) days prior to the effective date of
D. When Transporter posts a Hydrocarbon Dew point limit for a particular pipeline
segment or location, all gas receipts into the affected area from interconnects or
from any adjacent pipeline segments feeding gas directly into the affected pipeline
segment must meet the posted Hydrocarbon Dew point limit for the affected pipeline
E. Transporter shall post Hydrocarbon Dew point limitations for a given line segment or
location only 1) to the extent necessary to prevent liquid fallout from occurring,
2) in order to manage and operate Transporter's system in a safe and reliable
manner, and 3) as required to ensure that gas will be accepted for delivery at
interconnects with interstate pipelines, intrastate pipelines, end-users or directly
connected local distribution companies. Such posted Hydrocarbon Dew point
limitations shall remain in effect no longer than necessary.
F. Transporter shall perform Receipt Point Hydrocarbon Dew point calculations for this
Section 2.2 using the Peng-Robinson equation of state and C6+ assumptions consistent
with industry practices. Upon a Shipper's request, Transporter shall conduct a C9+
analysis; provided that in no event shall Transporter be required to conduct such
C9+ analysis at any one receipt point more frequently than once every twelve months.
Transporter shall post on its Internet Website the chromatograph data available at
not less than four (4) locations, including West of Thoreau, San Juan, Panhandle and
West Texas mainlines, to monitor the gas quality of the blended gas stream existing
in the mainline system. These gas quality monitoring locations shall be at points
where the aggregated gas stream encompasses all or most of the gas from the West of
Thoreau, San Juan, Panhandle and West Texas mainlines, respectively.